If her "awwww! Yes ... !" reaction doesn't melt your heart, then that little dog jumping and wagging his tail when they kiss will definitely finish you off.
We get a lot of video game proposals and weddings over the weekends - YouTube user bradsmith182 shows how to do it right. (Which is good, he only gets one shot, after all.) Simple level design, easy-to-read message, hidden cam to get her reaction and, of course, the dog. Man, the dog. I hope the little guy's a part of the wedding, although he looks like he might pee on a ringbearer out of excitement.
Congratulations bradsmith182 and Mrs. bradsmith182!
Custom Mario Proposal [Pushing Play]